Author: Petr Skoda
MDL-32735 add missing message provider info for unmaintained enrol_authorize
http://git.moodle.org/gw?p=moodle.git;a=commit;h=c859433c3d1b83cfe03e06c418dc4f1c1479bb36
http://github.com/moodle/moodle/commit/c859433c3d1b83cfe03e06c418dc4f1c1479bb36
+ 2.3 en [messageprovider:authorize_enrolment,enrol_authorize]